fix(chat): allow Xiaomi Facebook keyboard fallback

src/hooks/use-keyboard-height.ts

@@ -65,8 +65,9 @@ export function useKeyboardHeight({
       rafId = null;
 
       const metrics = readViewportMetrics();
+      const activeNow = isKeyboardTargetActive(targetRef?.current, activeRef.current);
       if (
-        activeRef.current &&
+        activeNow &&
         fallbackAllowedRef.current &&
         lastMayBeKeyboardClose &&
         shouldReleaseFallback(metrics, focusedAtRef.current)
@@ -86,7 +87,7 @@ export function useKeyboardHeight({
         ? computeFallbackLift(metrics)
         : 0;
       const inputLift = Math.round(
-        activeRef.current
+        activeNow
           ? Math.max(
               computeTargetOverlap(targetRef?.current, metrics.visibleBottom),
               fallbackLift,
@@ -118,7 +119,8 @@ export function useKeyboardHeight({
         );
         log.debug("[keyboard] apply", {
           environment,
-          active: activeRef.current,
+          active: activeNow,
+          reactActive: activeRef.current,
           inputLift,
           fallbackLift,
           fallbackAllowed: fallbackAllowedRef.current,
@@ -232,7 +234,6 @@ function computeTargetOverlap(
 
 function computeFallbackLift(metrics: ViewportMetrics): number {
   if (!shouldUseInAppKeyboardFallback()) return 0;
-  if (metrics.hasVirtualKeyboard && metrics.keyboardHeight <= 0) return 0;
 
   const viewportAlreadyShrank = metrics.visibleHeight < metrics.layoutHeight * 0.82;
   const keyboardAlreadyDetected = metrics.keyboardHeight > 80;
@@ -265,6 +266,13 @@ function isPossibleKeyboardCloseEvent(event: Event): boolean {
   return event.type === "resize" || event.type === "geometrychange";
 }
 
+function isKeyboardTargetActive(
+  target: HTMLElement | null | undefined,
+  reactActive: boolean,
+): boolean {
+  return reactActive || (target != null && document.activeElement === target);
+}
+
 function shouldUseInAppKeyboardFallback(): boolean {
   if (typeof navigator === "undefined") return false;
   const ua = navigator.userAgent;